Apparatus for riveting knife-scales



v(No Model.

, H. H. FRANCIS. APPARATUS FOR RIVETING KNIFE SGALES.

Patented May 9, 1882.

UNITED STATES PATENT OFFICE.

HENRY H. FRANCIS, OF NAUGATUCK, CONNECTICUT.

APPARATUS FOR RIVETING KNIFE-SCALES.

SPECIFICATION forming part of Letters Patent No. 257,685, dated May 9, 1882. Application filed February 16, 1882. (No model.)

To all whom "it may concern:

Be it known that I, HENRY H. FRANcIs, of Naugatuck,in the county of New Haven and State of Connecticut, have invented a new Improvement in Apparatus for Riveting Knife Scales; and I do hereby declare the following, when taken in connection with accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in-

Figure 1, afront View Fig. 2, a top view; Fig. 3, a sectional side View; Fig. 4, an enlarged view of the cutters to illustrate the operation of the machine.

This invention relates to an improvement in machinery for attaching the scale to the linings of pocket-knives. In the usual method of attachment the rivets are cut to the required length and inserted by hand into the perforation made in the scale and lining. In such case the judgment of the operator is necessary to be exercised in order that the rivet may pro- 2 5 ject only to the required extent.

The object of this invention is to insert the wire through the perforation and then cut to the required length upon both sides, so that the exact required projection is attained; and it consists in the mechanism hereinafter de scribed, and more particularly recited in the claims.

A A represent the guides through which the wire (a is introduced.

b c are two stationary cutters, arranged in the line of the wire a, and distant from each other according'to the thickness of the scale and lining, as seen in Fig. 4, in which d represents the lining, and e the scale.

f and h represent two corresponding mov-' able cutters hung to levers B, the said levers having their fulcrum at t', so that by the movement of the levers the cutters f'h are forced into cutting contact with the corresponding cutters, b c. That the one handle, B, may operate both cutters, each cutter is attached to a correspondinglever, B, and the two levers connected by a bar, D, as seen in Figs. 1 and 3, one of the lovers extending to form a handle, as seen in Figs. and 2. The two pairs of cutters being adjusted according to the thickness of the combined scale and lining, as seen in Fig. 4, the scale and lining, havingbeen bored, are introduced between. the cutters, as seen in Fig. 1, to bring the hole in line with the wire. Then the wire is passed through the hole and so as to project on the opposite side. Then the operator, by means of the handle, brings the cutters together and simultaneously cuts the wire at both the out and in side, leaving only the required projection for riveting purposes.

To adjust the cutters relatively to each other,one of the cutters (here represented the upper) is made movable toward and from the other in suitable guides, and is held up from the lower cutters by means of a. spring, E, and on the opposite side a lever, F, hung upon a fulcrum, m, is made to bear. This leveris operated by the workman by foot or hand, (here represented as through a rod, H,) so that when he introduces the scale and lining between the cutters he may force the one pair toward the other until the required position is attained. This adjustment is such that the workman can instantly move the knives toward or from each other, and this adjustment is desirable because of the varying thickness of the same scale-that is, the same scale requires different lengths of rivets. This givesan advantage over previously cut rivets, because here the rivet is out to the required length, and no assortment of rivets is necessary, and the cutting is more perfectly done than it can be when the wire is inserted and cut off by hand.

For the convenience of the operator a stationary handle, L, is arranged, corresponding to the movable handle of the cutter-lever, as seen in Fig. 2, so that he may grasp the two as a pair of gripping-levers.

Iv claim- 1. The combination of the two pairs of cutters I) c, f 71, arranged to receive the scale and lining between them, with guides to conduct 5 the wire through the hole in the scale and lining, while arranged between the two pairs of cutters, and mechanism, substantially such as described, to adjust the two pairs of cutters relatively to each other substantially as described.

Witnesses: HENRY H. FRANCIS.

, H. O. BALDWIN,

J. M. SWEENEY. 

